You can click the arrow at the left of the add-on box to see more information, such as
its location, a description and a link to the documentation.
Here you can also find a button to report a bug specific of this add-on.

Tip

Saving Add-on Preferences

If you want an Add-on to be enabled every time you start Blender,
you will need to Save User Settings.

Add-ons that activate or change multiple hotkeys now have a special system of activation.
For example, with the “UI: Pie Menu Official” add-on
for each menu there’s a selection box to activate the menu and its hotkey.

With Pie menus, First you activate the add-on. This activates the “Add-ons Preferences Submodule Activation”.
You then need to expand the Add-ons Preferences, then you will see the list of Pie Menu types you can choose from.
From here you can individually activate the menus you like to use.
If the menu conflicts with another favorite, there’s no need to activate it.
You can activate any combination and save as user settings
so your activations are available next time you start Blender.